Java Hex Calculate toHexString(byte[] bytes)

Description

to Hex String

License

Open Source License

Declaration

public static String toHexString(byte[] bytes) 

Method Source Code

//package com.java2s;

public class Main {

    public static String toHexString(byte[] bytes) {
        StringBuffer buffer = new StringBuffer(bytes.length);
        int startIndex = 0;
        int column = 0;
        for (int i = 0; i < bytes.length; i++) {
            column = i % 16;//from   w w w  . j av a  2 s .c  om
            switch (column) {
            case 0:
                startIndex = i;
                buffer.append(fixHexString(Integer.toHexString(i), 8)).append(": ");
                buffer.append(toHex(bytes[i]));
                buffer.append(" ");
                break;
            case 15:
                buffer.append(toHex(bytes[i]));
                buffer.append(" ");
                buffer.append(filterString(bytes, startIndex, column + 1));
                buffer.append("\n");
                break;
            default:
                buffer.append(toHex(bytes[i]));
                buffer.append(" ");
            }
        }
        if (column != 15) {
            for (int i = 0; i < (15 - column); i++) {
                buffer.append(" ");
            }
            buffer.append(filterString(bytes, startIndex, column + 1));
            buffer.append("\n");
        }

        return buffer.toString();
    }

    private static String fixHexString(String hexStr, int length) {
        if (hexStr == null || hexStr.length() == 0) {
            return "00000000h";
        } else {
            StringBuffer buf = new StringBuffer(length);
            int strLen = hexStr.length();
            for (int i = 0; i < length - strLen; i++) {
                buf.append("0");
            }
            buf.append(hexStr).append("h");
            return buf.toString();
        }
    }

    public static String toHex(byte b) {
        char[] buf = new char[2];
        for (int i = 0; i < 2; i++) {
            // buf[1 - i] = digits[b & 0xF];
            b = (byte) (b >>> 4);
        }
        return new String(buf);
    }

    public static String filterString(byte[] bytes, int offset, int count) {
        byte[] buffer = new byte[count];
        System.arraycopy(bytes, offset, buffer, 0, count);
        for (int i = 0; i < count; i++) {
            if (buffer[i] >= 0x0 && buffer[i] <= 0x1F) {
                buffer[i] = 0x2e;
            }
        }
        return new String(buffer);
    }
}

Related

1. toHexString(byte[] bytes)
2. toHexString(byte[] bytes)
3. toHexString(byte[] bytes)
4. toHexString(byte[] bytes)
5. toHexString(byte[] bytes)
6. toHexString(byte[] bytes)
7. toHexString(byte[] bytes)
8. toHexString(byte[] bytes)
9. toHexString(byte[] bytes)